PHP - Manual: pg_copy_from

2024-11-15

pg_copy_from

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_copy_from — 根据数组将记录插入表中

说明

pg_copy_from(
    resource $connection,
    string $table_name,
    array $rows,
    string $delimiter = ?,
    string $null_as = ?
): bool

pg_copy_from() 将数组 rows 的内容作为记录插入表中。它在内部使用了 COPY FROM SQL 命令来插入记录。

参数

connection: PostgreSQL database connection resource.
table_name: Name of the table into which to copy the rows.
rows: An array of data to be copied into table_name. Each value in rows becomes a row in table_name. Each value in rows should be a delimited string of the values to insert into each field. Values should be linefeed terminated.
delimiter: The token that separates values for each field in each element of rows. Default is TAB.
null_as: How SQL NULL values are represented in the rows. Default is \N ("\N").

返回值

成功时返回 true，或者在失败时返回 false。

范例

示例 #1 pg_copy_from() example


<?php
   $db = pg_connect("dbname=publisher") or die("Could not connect");
   
   $rows = pg_copy_to($db, $table_name);
   
   pg_query($db, "DELETE FROM $table_name");
   
   pg_copy_from($db, $table_name, $rows);
?>

参见

pg_copy_to() - 将一个表拷贝到数组中

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User Contributed Notes 9 notes

down

karlo dot petravic at hotmail dot com ¶

2 years ago


As table name you can also specify columns you want imported.

Will import all columns:
<?php
pg_copy_from($db, 'cpm.ics', $rows);
?>

Will import only specified columns:
<?php
pg_copy_from($db, 'cpm.ics (type, product, date, count, amount)', $rows);
?>

down

Dave ¶

8 years ago


Default is "\\\N" not "\\N" at least in php 5.4

pg_copy_from($db, $table_name, "\t", "\\\N")

down

smcbride at msn dot com ¶

1 year ago


When using this function, don't get bit by the double quote (") vs. single quote (') differences.  It is a small thing, but the error messaging is misleading.  If you use a single quote, you will see the \t separated values all try to be inserted into the first field.

Small consideration, but will save someone who is working late and can't get these functions to work.

down

Anonymous ¶

13 years ago


see also: pg_put_line for a solution that does not require buffering of all the data to be copied,

down

vlad at php dot net ¶

19 years ago


By default NULL values are a backslash followed with capital N ("\\N"). 

Also, you can't insert entries with OIDs (I've added it to my TODO list though)

down

-1

Dave ¶

10 years ago


As of postgresql 9.1 "standard_conforming_strings" is set to on

This will not work anymore
<?php
$copy_message = "1\t\\N\t300";
pg_copy_from($db, "message", $copy_message);
?>
result will be a "N" in that field. if the field allow text that is else it will fail to insert the post.

simple fix
<?php
$copy_message = "1\t\\NULL\t300";
pg_copy_from($db, "message", $copy_message, "\t","\\NULL");
?>

down

-1

kapouer_php at melix dot org ¶

14 years ago


pg syntax is :
COPY test (cola, colb, colc) FROM stdin;
...

this function doesn't let you in which order the columns are !

down

-1

carl at thep.lu.se ¶

19 years ago


Something needs to be said about the format of the array.
Judging by what I've seen, it's pretty much what you get
from loading a tab-separated file with file(). That is, the
lines are linefeed-terminated and there's no need to have
an extra line with "\.". On the other hand, when I try using this
command the connection to the server ends up in some odd
state and is then lost:
PHP Warning:  U?S?o() query failed: server closed the connection unexpectedly

I think it might be safer to use the lower-level function
pg_put_line() for now.

down

-8

Dave ¶

11 years ago


Fix for "Copy command failed: ERROR: literal carriage return

found in data" or 

"Copy command failed: ERROR: missing data for column

"message" CONTEXT: COPY message, line 1:"


<?php

$message = "HEJ\rHEJ\nHEJ\r\nHEJ\n\rHEJ\tHELLO\\";


$message = addslashes($message);


$message = str_replace(

  array("\n","\r","\t"),

  array("\\n","\\r","\\t"),

  $message);


$copy_message = "1\t". $message ."\t300";


pg_copy_from($db, "message", $copy_message);

?>

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官方地址：https://www.php.net/manual/en/function.pg-copy-from.php

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pg_copy_from

说明

参数

返回值

范例

参见

User Contributed Notes 9 notes